Condensed Heterocycles with a Thiazole Ring. 1. Thiazolopyrimidine Derivatives

Article abstract of DOI:10.1007/BF00526080

It is shown that the reaction of 1,3-dicarbonyl compounds or their acetals with 2-methylthio-4-amino-5-phenylthiazolium benzenesulfonate gives 6-methylthiothiazolo<3,4-a>pyrimidinium salts, which react with the appropriate intermediates to give polymethin